Creating arrays with different sized plots

Besides creating non-rectangular arrays, the layout() function can be used to create plot arrays with different sized component plots -- something else that is not possible by setting the par() function's mfrow parameter.

This exercise illustrates the point, asking you to create a standard scatterplot of the zn versus rad variables from the Boston data frame as a smaller plot in the upper left, with a larger sunflower plot of the same data in the lower right.

Instructions

The Boston data frame in the MASS package is already available in your workspace.

Using the c() function:
- Create the three-element vector row1 with values (1, 0, 0).
- Create the three-element vector row2 with values (0, 2, 2).
- Combine the first vector with two copies of the second vector into layoutVector, a vector of length 9.
Using the matrix() function, convert layoutVector into the 3-by-3 matrix layoutMatrix whose first row is row1 and whose second and third rows are row2.
Use the layout() function with layoutMatrix to configure a two-element plot array.
In the first (smaller) plot, create a standard scatterplot of the zn variable versus the rad variable from the Boston data frame.
In the second (larger) plot, create a sunflower plot using the sunflowerplot() function and the same variables.

Take Hint (-30xp)